Поиск, ошибка.

Если искать слова: он или она
То поиск вываливается с ошибкой:

ERROR: GIN index does not support search with void query

org.postgresql.util.PSQLException: ERROR: GIN index does not support search with void query
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl .java:1548)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java: 1316)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:191)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java :452)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2State ment.java:351)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement .java:255)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.postgresql.ds.jdbc23.AbstractJdbc23PooledConnection$StatementHandler.invoke (AbstractJdbc23PooledConnection.java:471)
at $Proxy2.executeQuery(Unknown Source)
at ru.org.linux.site.SearchViewer.show(SearchViewer.java:67)
at ru.org.linux.site.ViewerCacher.get(ViewerCacher.java:39)
at _search__jsp._jspService(_search__jsp.java:103)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.subservice(Page.java:506)
at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:115)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:223)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:103)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:80)
at org.tuckey.web.filters.urlrewrite.RewrittenUrl.doRewrite(RewrittenUrl.java:176)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.ja va:728)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:346)
at com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:274)
at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
at java.lang.Thread.run(Thread.java:595)